CVE-2026-9640
7.2 · HIGHOverview
CVE-2026-9640 is a high-severity vulnerability affecting canonical lxd. It was published on June 26, 2026 and has a CVSS 3.1 base score of 7.2 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.2, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical Description
A privilege escalation vulnerability exists in LXD from 6.0 before 6.9, 5.21.0 before 5.21.5, and 5.0.0 before 5.0.7 regarding the handling of project-restriction policies during snapshot restoration.. An authenticated project operator in a restricted multi-tenant environment can bypass policy restrictions by importing a maliciously crafted instance backup containing restricted configuration keys within a snapshot. When the snapshot is restored, these restricted keys are applied to the live instance without policy validation. Starting the modified instance grants the operator unauthorized host root access.
Remediation
Check the references section for vendor advisories and patches from canonical. Update lxd to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| canonical | lxd | >= 4.12, < 5.0.7 | Affected |
Frequently Asked Questions
What is CVE-2026-9640?
CVE-2026-9640 is a high-severity vulnerability affecting canonical lxd. It was published on June 26, 2026 and has a CVSS 3.1 base score of 7.2 (HIGH).
How severe is CVE-2026-9640?
This vulnerability has a CVSS 3.1 base score of 7.2, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2026-9640?
Check the references section for vendor advisories and patches from canonical. Update lxd to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-9640?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-9640 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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